Multiple-burner incandescent lamp.



R. D. CODY. MULTIPLE BURNER INGANDESGENT LAMP. APPLICATION FILED JAN.15, 1912.

Patented July 9, 1912.

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R. n. CODY. MULTIPLE BURNER INGANDESGENT LAMP. APPLICATION IILED .1411. 15, 1912.

1,032,325, Patented; July 9, 1912.

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ROBERT D. CODY, or nn'raorr, MICHIGAN, ASSIGNQR 'ro SAMUEL STEIN, or NEW YORK, N. Y.

MULTIPLE-BURNER incannnso'mvr LAMP.

Specification of Letters Patent.

Patented July 9, 1912,

Application filed January 15, 1912. Serial No. 671,322.

Incandescent Lamps, of which the following is a SPBClfiCtLtlOIl;

My invention relates to incandescent gas lamps of the type using inver ed burners with incandescentmantles.

The objects thereof are to providea new and improved regulating valve by which the flow of gas to the burners is controlled and from which at the same time supplemental gas may be supplied to a pilot light having an independent gas supply whereby the latter may be made to flash just before the .main current of gas is turned on to the principal burner, and also to make a similar flash after the gas is turned off from said burners. I also provide a new and improved licad by which a quick supply of gas to the mantles may be had, thereby reducing the tendency to make explosive mixtures and cause the flame to flash back. A screen is also provided as a further protec .tion against flash back, the same being located outside of the body of the lamp and readily accessible for cleaning or change; and I provide a special mechanism whereby a single chain may be used to operate the device for turning the gas on and oil from the principal burner.

The principles of my invention are illus trated in the drawings, in which-- Figure 1 represents a vertical section of a lamp of the character described provided with my improvements; Fig. 2 shows a single chain pull with counter-weights for operating the principal valve; Fig. 3 is a section of Fig. 2 on the line 3 3; Fig. 4 is an enlarged section of Fig. 3 on the line l-i-, showing the controlling valve closed;

is a similar view showing the con;

' trolling valve partly turned; Fig. 6 is a section of Fig. l on the line 6-6; Fig. '7 is a view of the screen with its mounting frame taken on the line if- 7 of Fig. 8 is a cross section of Fig. 1 on the line 8- 8;

Fig. 9 is a cross section of Fig. 1 on the line urther describing my invention with ref erence to the drawings, in which lliitj characters of reference denote like parts the screw 23.

throughoutf 1 isthe body portion, and 2 the globeattached thereto, of a lamp of the character indicated above. The principal .feed pipe 2 extends downward into a union 3. To the lower part of the union is attached a, burner head 4-, the outer walls of which represent in cross section a truncated cone. l/Vithin the same and having its walls substantially parallel with the outer walls is a cone-shaped portion 5, the lower edges of which are substantially flush with the lower edges of 4 and together with the same are attached to an annular member 3 in which at regular intervals are secured the burner tubes 10l010, which convey gas 'to the mantles 1.1.

The union 3 is divided by partition 12, thereby forming the upper chamber 13 and the lower chamber 14. From the side of the union 3 at chamber 13 is led a horizontal pipe 15 which. enters the valve casing 16 substantially in a line with its central longitudinal. axis. Anoft-set 18 extends from the valve casing and has'a perforation 19 extending into the same to a point 20 at which is attacheda small pipe 21 terminating in the pilot burner 22. The flow of gas from the supply through pipe 15 is continuous and uninterrupted except as regulated by The conical valve plug 25 is seated in the. casing 16. A stem 26is extended outwardly and passes through a gland 27, having a central recess containing under adjustable pressure of the spring,

which may be tightened or loosened by screwing the gland inwardly or outwardly.- A. collar 80 is secured on the stem 26, and, spaced therefrom by a narrowed neck on said collar, is a ratchet 31 having four teeth 32 placed at equal distances around its periphery. Between the enlarged portion of said collar and the ratchetdisk and upon the neck of said collar is loosely mounted a le er 33 having a chain 34 attached to one end and a counter-weight 35 attached to the other end. A gravity actuated dog 36 is pivoted at 3'? to said lever and. is adapted to engage successively the peripheral teeth on the ratchet disk 31,, such engagement taking place normally in the position shown in Fig. 2 The lever moves through an are slightly greater than the fourth of a circle and with .each downward pull of chain 34 the ratchet a transverse openiu 41 through the peripheral walls so that w ien positioned as shown in Fig. 4 the current of gas through 15 asses lon itudinall of the plug clownwardly throughthe tube 42 and. then 'fhrough the pipe 43 until it reaches the air intake governed by the damper 44 and thence to the mixing tube 45, from which it passes through the chamber l t to the distributing head 5. The door of said head having a conical upward projection as here inbefore described causes the volume of gas to be distributed quickly to the burner pipes 10 instead of being checked or backened by a chamber having a flat baseone much longer than that therein used as is the usual practice;

When the gas leaves the shut-oil valve and casing 1d, it passes through the connection 46 into the chamber 47 through which passes the stem lS-of needle valve 49Jby' which the immediate flow of gas to the burners is regulated; Butthe screw 44" is designed to check t-his'flow, thus allowing the gas to obtain a regular and full expansion before it is released through the needle valve to the mixing tube. Undue pressure gas is thus reventedand blowing, whis tling and other like noises are entirely avoided.

Transversely of the mixin tube is :1 casing50 adapted to receive a removable slide 151 in which is placed a flat screen 52 ,45

through which the gas passes on its way to the burners. The screen being outside the lamp is not subjected to the heat thereof and it is not subject to carbonization or deter i oration thereby, When for any reason it is desirable to change the screen the slide is readily accessible, and when removed from the guideway's the screen can readily be replaced, even when the lamp is heated.

here is a constant minimum flow of gas fro the principal source of gas supply from the pilot light through the aperture 19 as above. My apparatus is arranged to increase such flow so as to produce a flash at the time the gas is-tui-n ed on to the principal burners, thereby ignlting the same before an explosive mixture is created, and also to check the=.increased flow as soon as Copies of this patent may be obtained for quently becomes carbonized while ltheprine cipal light is burning. I have'fouud' that this carbon maybe removed by. a second ffiasl at the time the principal burner 1s extinguished. Both the initial and final flash may be produced by arranging the;

auxiliary ports 55 in. the valve plug 25in proper relation to the opening 40in said plug. The increased volume of gas will then flow to the pilot burner through-the conduits 56 and 57.

I claim:

tion with a burner head comprising afconical outer wall, an annular member secured to the lower part of said wall, and a conical inner wall attached to said annular memberand extended upwardly within said outer] wall, of a supply pipe attached; to the apex of said outer wall and centrallyaline'dwith the axis of said inner wall. 7 p

2. In an incandescent lamp having apt-1n.-

cipal source oi gas supply and apilot burner 1 1. In an incandescentlamp; the combinm connected therewith; the combination of a},

principal burner, a conical valve casing havfi ing peripheral outlet openings "adaptedjto:

communicate with'the principal burner and the pilot burner, a conical valveplug 111wt-l an l l inlet Opening, a plurality-of diametrically opposed principal outlet open-1 ings adapted to register withthe casing openings communicating with the principal burner, and a pluralityiofoutlet openings so related to the principal open ngs as to register with the pilot light outlet openings immediately before the-principal openings in the casing and filug are epnnected and immediately after said openings are I disconnected, and means. for giving said plug successive half revolutions;

3. In an incandescentlamp, the combination of a body portion having burners there- "in, a mixing tube extended outside said body portion, and a screen placed trans versely of said mixing tube externally of the body of said lamp. V

4c. In an incandescent lamp, the combmation of a body portion having burners therein, a mixing tube extended outside sald body portion and provided -W1tll I atransverse guidewayexternal to the body of the lamp, and a screen 'removably mounted in sald guideway.

In witness whereof, I have hereunto subscribed my name, this 6th day of January A. D. 1912, in the presence of two subscribing witnesses. 7

ROBERT D. CODY.

YVitnessesz. i C. K. CHAMBERLAIN,

A. S. PHILLIPS.

five cents each, by addressing the Commissioner o1 Patents, Washington, D. G. 

